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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 330 · 40 questions
TalentJR

The fast method (Build from 10%): 10%: divide by 10. 1%: divide by 100. 5% = half of 10%, 20% = double 10%, 15% = 10% + 5%. 50% = half, 25% = half of a half.

NameDateTime takenScore ___ / 40
  1. 1.15% of 100 =
  2. 2.50% of 900 =
  3. 3.15% of 690 =
  4. 4.50% of 580 =
  5. 5.10% of 610 =
  6. 6.15% of 520 =
  7. 7.10% of 80 =
  8. 8.10% of 430 =
  9. 9.25% of 160 =
  10. 10.1% of 880 =
  11. 11.25% of 620 =
  12. 12.10% of 380 =
  13. 13.50% of 700 =
  14. 14.20% of 510 =
  15. 15.5% of 190 =
  16. 16.1% of 30 =
  17. 17.5% of 230 =
  18. 18.5% of 190 =
  19. 19.10% of 300 =
  20. 20.10% of 140 =
  21. 21.20% of 490 =
  22. 22.25% of 60 =
  23. 23.15% of 720 =
  24. 24.50% of 670 =
  25. 25.25% of 440 =
  26. 26.1% of 150 =
  27. 27.5% of 350 =
  28. 28.25% of 160 =
  29. 29.50% of 280 =
  30. 30.50% of 180 =
  31. 31.10% of 810 =
  32. 32.50% of 390 =
  33. 33.25% of 470 =
  34. 34.10% of 60 =
  35. 35.20% of 860 =
  36. 36.50% of 420 =
  37. 37.1% of 800 =
  38. 38.5% of 170 =
  39. 39.20% of 440 =
  40. 40.5% of 710 =

Answer key

  1. 15
  2. 450
  3. 103.5
  4. 290
  5. 61
  6. 78
  7. 8
  8. 43
  9. 40
  10. 8.8
  11. 155
  12. 38
  13. 350
  14. 102
  15. 9.5
  16. 0.3
  17. 11.5
  18. 9.5
  19. 30
  20. 14
  21. 98
  22. 15
  23. 108
  24. 335
  25. 110
  26. 1.5
  27. 17.5
  28. 40
  29. 140
  30. 90
  31. 81
  32. 195
  33. 117.5
  34. 6
  35. 172
  36. 210
  37. 8
  38. 8.5
  39. 88
  40. 35.5

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